Shears for cutting metals.



No. 804,579. PATENTED NOV. 14, 1905. J; G. BURGESS.

SHEARS FOR CUTTING METALS.

APPLIUATION FILED SEPT. 9. 1905.

" of one of the arms detached from the machine.

frame member B has a curved slot 0 therein,

JAMES C. BURGESS, OF SULLIVAN, INDIANA.

SHEAFRS FOR CUTTiiNGI METALS.

Application filed September 9,

To ctZ/I whom, it may concern.-

Be it known that I, JAMns O. BURGESS, a citizen of the United States, residing at Sullivan, in the county ofSullivan and State of Indiana, have invented new and useful Improvements in Shears for Cutting Metals; and I do declare the following to be a full, clear, and exact description of the invention, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to hand-power shears for cutting metals, especially cold iron, and refers more particularly to shears that are adapted to be used in blacksmith shops and various factories and also in iron warehouses.

Objects of the invention are to provide powerful shears for cutting metals, to provide shears that will be suitable to be constructed in small sizes for use in small shops which may be portable, and to provide shears that may be constructed at relatively small cost and be durable and economical in use.

With the above-mentioned and minor objects in view the invention consists in cuttingshears having a pair of arms. one of which carries a cutting-blade, and a pair of connected levers cooperating with both of the arms to operate the cutting-blade, and theinvention consists, further, in the novel elements and in the combinations and arrangements of parts, as hereinafter particularly described and claimed.

Referring to the drawings, Figure 1 is aside elevation of the shears; Fig. 2, a fragmentary side elevation thereof, showing the side opposite to that seen in Fig. 1; Fig. 3, a top plan thereof; Fig. 4:, an end elevation; Fig. 5, a side elevation partially broken away and showing the parts of the shears as they would appear after making a cut, and Fig. 6 atop plan Like reference characters in the drawings designate like parts or features.

In construction the machine embodying the invention comprises a base A, on which is erected upright frame members B and B, the upper portion of the member B having a shearhead (J attached thereto, to which is secured a shear-blade a, and a table 6 is attached to the member B. A cutter-arm D is pivoted to the frame members by a pivot c, and it carries a shear-blade (Z, that is secured thereto, so as to cooperate with the shear-blade a. The

Specification of Letters Patent.

in which is arranged a guide-bolt j, that is Patented Nov. 14, 1905.

1905. Serial No. 277,750.

connected to the movable end of the arm D. Somewhat below the cutter-arm D an arm E is connected by a pivot r to the frame members, the pivot 7 being in different vertical and horizontal planes than the pivot 0, as indicated particularly in Figs. 1 and 5. The movable end of the arm E has an opening 72/, in which a roller-bearing F is mounted on a pivot e.

A secondary lever Gr is connected pivotally to the guide-bolt f, and thereby to the cutterarm I), and the lever is connected by' a pivot j to a link Z, the fulcrum end of the lever having a semicircular bearing-face j, that rides on the roller F of the lever E, the link 7 being connected also to the pivot e to hold the face 7" to the roller.

In a recess of the base A two rollersI-Iand H are mounted on pivots Z and Z, and a bearing-shoe I, having rack-teeth m on the top thereof, is mounted movably in the recess upon the rollers H and H, there beingafixed guide or under which the shoe moves to prevent the inner end of the shoe from tilting upwardly when the shoe is moved outwardly.

A main lever J has a semicircular fulcrum end provided with gear-teeth 12, that mesh with the teeth on, the fulcrum end having its bearing on the shoe 1, and a guide-pin q is connected to the lever and extends into a guide-slot w in the frame member B, the lever J being connected by a pivot-pin to the movable end of the arm E.

Two link-bars K and K are connected, by a pivot 2,, to the movable end of the lever (i and by a pivotal to the body portion of the lever J.

In practical use the lever J is to be moved to an upright position, as in Figs. 1, 2, 8, and 4c, the lever G being also in upright position, when the shear-blades will be open, so that the metal that is to be cut may be placed between them. Then the lever J is to be moved downwardly, the lever G being also drawn downwardly, so that the shoe will move inwardly, the arm E will rise and carry with it the fulcrum end of the lever Gr, which will at the same time raise the end of the cutter-arm D and cause the shears to operate, after which the lever J is to be again moved uprightly for another operation.

Having thus described the invention, what is claimed as new is--- 1. Shears including a base and a frame thereon having a shear-blade, a pair of rollers mounted in the base, a shoe movable on the rollers, a main lever mounted on the shoe and provided with a guide, an arm pivoted to the frame and also to the main lever, a secondary lever mounted on the arm and connected with the main lever, a cutter-arm pivoted to the frame and also to the secondary lever, a guide for the cutter-arm, and a shearblade attached to the cutter-arm.

2. Shears comprising a base, a pair of rollers mounted in the base, a shoe mounted movably on the rollers and having rack-teeth thereon, a main lever provided with a guide and having gear-teeth meshing with the rackteeth of the shoe, a frame having a shearhead thereon, a shear-blade attached to the shear-head, an arm pivoted to the frame and also to the main lever and provided with a bearing-roller, a secondary lever mounted on the bearing-roller, a link connecting the secondary lever with the arm, a pair of link-bars connecting the end of the secondary lever with the body portion of the main lever, a cutter-arm pivoted to the frame and also to the secondary lever, and a shear-blade attached to the cutter-arm.

3. Shears comprising a base, a pair of rollers mounted in the base, a shoe mounted movably on the rollers and having rack-teeth thereon, a frame on the base and having a horizontal guide-slot and also a vertical curved guide-slot, a main lever having guide-teeth meshing with the rack-teeth of the shoe and provided with a guide extending into the horizontal guide-slot, a shear-head attached to the frame, a shear-blade attached to the shearhead, an arm pivoted to the frame and havinga slot therein in which a bearing-roller is mounted, a pivot connecting the arm to the main lever, a secondary lever mounted on the bearingroller, a link connecting the secondary lever with the arm, a pair of link-bars pivoted to the end of the secondary lever and also to the body portion of the main lever, a fixed guide in contact with the top of the shoe, a cuttera-rm pivoted to the frame and also to the secondary lever, a guide-bolt carried by the cutter-arm and extending through the vertical curved guide-slot, and a shear-blade attached to the cutter-arm.

In testimony whereof I aflix my signaturein presence of two witnesses.

JAMES C. BURGESS.

Witnesses:

A. O. OWENS, MATTIE HAYs. 

